(14 Mar 2016, 3:43 pm)NK53 TKT wrote I doubt that...I can see something else replacing the Cadet's at Stockton. I may be wrong like!
Possibly Ashington for Sapphire spares for the X21/X22[emoji14] (NOT)
Option 1: Stockton to replace cadets
Option 2: Make the 52/53 an eco brand with new streetlites and have them go to Jesmond to support the withdrawal of some B10s like 4517.
Option 3: MAX them and send them to Darlington for 21A.
EDIT: Possibly Belmont for use on the 46, 49 or 64
Another option would be Darlington for either the 8/8A or 12/12A, although I think the 8/8A will remain Pulsar operated and one issue is where would you put the two EcoCitys that would be spare (providing all 14 are on the road).
As for Belmont in your edited post, 46 is going MAX using Volvo B7TL/ALX400's and I can see the 49/49A going Frequenta using Solo's, could maybe put them on the 56/57/57A/86 though alongside the Solo's. I think they would be too small for the 43.